Home / 1,528.45-2,107.20-1,214.75

Finding the Fourth Proportional to 1,528.45, 2,107.20 and 1,214.75

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Solution

The fourth proportional to 1,528.45, 2,107.20 and 1,214.75 is: 1,674.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,528.45 : 2,107.20 = 1,214.75 : x
  2. Step 2: Convert to fraction form
    1,528.45/2,107.20 = 1,214.75/x
  3. Step 3: Cross multiply
    1,528.45x = 2,107.20 × 1,214.75
  4. Step 4: Simplify right side
    1,528.45x = 2,559,721.20
  5. Step 5: Solve for x
    x = 2,559,721.20/1,528.45
  6. Step 6: Final answer
    x = 1,674.72

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.